Brian Urlacher has confirmed that he will appeal against a $15,750 (£10,000) fine levied by the NFL.
The Chicago Bears linebacker was hit with the fine for a horse collar tackle on Minnesota Vikings running back Adrian Peterson.
The Vikings were awarded a 15-yard penalty after the fourth-quarter incident.
Vikings defensive end Jared Allen was also handed a fine after the game for a blind-side hit on Lance Louis.
The Bears won the game 28-10.
